[SPARK-37867][SQL] Compile aggregate functions of build-in JDBC dialect

external/docker-integration-tests/src/test/scala/org/apache/spark/sql/jdbc/v2/DB2IntegrationSuite.scala

@@ -18,13 +18,14 @@
 package org.apache.spark.sql.jdbc.v2
 
 import java.sql.Connection
+import java.util.Locale
 
 import org.scalatest.time.SpanSugar._
 
 import org.apache.spark.SparkConf
 import org.apache.spark.sql.AnalysisException
 import org.apache.spark.sql.execution.datasources.v2.jdbc.JDBCTableCatalog
-import org.apache.spark.sql.jdbc.{DatabaseOnDocker, DockerJDBCIntegrationSuite}
+import org.apache.spark.sql.jdbc.DatabaseOnDocker
 import org.apache.spark.sql.types._
 import org.apache.spark.tags.DockerTest
 
@@ -36,8 +37,9 @@ import org.apache.spark.tags.DockerTest
  * }}}
  */
 @DockerTest
-class DB2IntegrationSuite extends DockerJDBCIntegrationSuite with V2JDBCTest {
+class DB2IntegrationSuite extends DockerJDBCIntegrationV2Suite with V2JDBCTest {
   override val catalogName: String = "db2"
+  override val namespaceOpt: Option[String] = Some("DB2INST1")
   override val db = new DatabaseOnDocker {
     override val imageName = sys.env.getOrElse("DB2_DOCKER_IMAGE_NAME", "ibmcom/db2:11.5.6.0a")
     override val env = Map(
@@ -59,8 +61,13 @@ class DB2IntegrationSuite extends DockerJDBCIntegrationSuite with V2JDBCTest {
   override def sparkConf: SparkConf = super.sparkConf
     .set("spark.sql.catalog.db2", classOf[JDBCTableCatalog].getName)
     .set("spark.sql.catalog.db2.url", db.getJdbcUrl(dockerIp, externalPort))
+    .set("spark.sql.catalog.db2.pushDownAggregate", "true")
 
-  override def dataPreparation(conn: Connection): Unit = {}
+  override def tablePreparation(connection: Connection): Unit = {
+    connection.prepareStatement(
+      "CREATE TABLE employee (dept INTEGER, name VARCHAR(10), salary DECIMAL(20, 2), bonus DOUBLE)")
+      .executeUpdate()
+  }
 
   override def testUpdateColumnType(tbl: String): Unit = {
     sql(s"CREATE TABLE $tbl (ID INTEGER)")
@@ -86,4 +93,8 @@ class DB2IntegrationSuite extends DockerJDBCIntegrationSuite with V2JDBCTest {
     val expectedSchema = new StructType().add("ID", IntegerType, true, defaultMetadata)
     assert(t.schema === expectedSchema)
   }
+
+  override def caseConvert(tableName: String): String = tableName.toUpperCase(Locale.ROOT)
+
+  testVarPop()
 }

external/docker-integration-tests/src/test/scala/org/apache/spark/sql/jdbc/v2/DockerJDBCIntegrationV2Suite.scala

@@ -0,0 +1,44 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *    http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.apache.spark.sql.jdbc.v2
+
+import java.sql.Connection
+
+import org.apache.spark.sql.jdbc.DockerJDBCIntegrationSuite
+
+abstract class DockerJDBCIntegrationV2Suite extends DockerJDBCIntegrationSuite {
+
+  /**
+   * Prepare databases and tables for testing.
+   */
+  override def dataPreparation(connection: Connection): Unit = {
+    tablePreparation(connection)
+    connection.prepareStatement("INSERT INTO employee VALUES (1, 'amy', 10000, 1000)")
+      .executeUpdate()
+    connection.prepareStatement("INSERT INTO employee VALUES (2, 'alex', 12000, 1200)")
+      .executeUpdate()
+    connection.prepareStatement("INSERT INTO employee VALUES (1, 'cathy', 9000, 1200)")
+      .executeUpdate()
+    connection.prepareStatement("INSERT INTO employee VALUES (2, 'david', 10000, 1300)")
+      .executeUpdate()
+    connection.prepareStatement("INSERT INTO employee VALUES (6, 'jen', 12000, 1200)")
+      .executeUpdate()
+  }
+
+  def tablePreparation(connection: Connection): Unit
+}

external/docker-integration-tests/src/test/scala/org/apache/spark/sql/jdbc/v2/MsSqlServerIntegrationSuite.scala

@@ -24,7 +24,7 @@ import org.scalatest.time.SpanSugar._
 import org.apache.spark.SparkConf
 import org.apache.spark.sql.AnalysisException
 import org.apache.spark.sql.execution.datasources.v2.jdbc.JDBCTableCatalog
-import org.apache.spark.sql.jdbc.{DatabaseOnDocker, DockerJDBCIntegrationSuite}
+import org.apache.spark.sql.jdbc.DatabaseOnDocker
 import org.apache.spark.sql.types._
 import org.apache.spark.tags.DockerTest
 
@@ -37,7 +37,7 @@ import org.apache.spark.tags.DockerTest
  * }}}
  */
 @DockerTest
-class MsSqlServerIntegrationSuite extends DockerJDBCIntegrationSuite with V2JDBCTest {
+class MsSqlServerIntegrationSuite extends DockerJDBCIntegrationV2Suite with V2JDBCTest {
 
   override val catalogName: String = "mssql"
 
@@ -58,10 +58,15 @@ class MsSqlServerIntegrationSuite extends DockerJDBCIntegrationSuite with V2JDBC
   override def sparkConf: SparkConf = super.sparkConf
     .set("spark.sql.catalog.mssql", classOf[JDBCTableCatalog].getName)
     .set("spark.sql.catalog.mssql.url", db.getJdbcUrl(dockerIp, externalPort))
+    .set("spark.sql.catalog.mssql.pushDownAggregate", "true")
 
   override val connectionTimeout = timeout(7.minutes)
 
-  override def dataPreparation(conn: Connection): Unit = {}
+  override def tablePreparation(connection: Connection): Unit = {
+    connection.prepareStatement(
+      "CREATE TABLE employee (dept INT, name VARCHAR(32), salary NUMERIC(20, 2), bonus FLOAT)")
+      .executeUpdate()
+  }
 
   override def notSupportsTableComment: Boolean = true
 
@@ -91,4 +96,9 @@ class MsSqlServerIntegrationSuite extends DockerJDBCIntegrationSuite with V2JDBC
 
     assert(msg.contains("UpdateColumnNullability is not supported"))
   }
+
+  testVarPop()
+  testVarSamp()
+  testStddevPop()
+  testStddevSamp()
 }

external/docker-integration-tests/src/test/scala/org/apache/spark/sql/jdbc/v2/MySQLIntegrationSuite.scala

@@ -24,7 +24,7 @@ import org.scalatest.time.SpanSugar._
 import org.apache.spark.SparkConf
 import org.apache.spark.sql.AnalysisException
 import org.apache.spark.sql.execution.datasources.v2.jdbc.JDBCTableCatalog
-import org.apache.spark.sql.jdbc.{DatabaseOnDocker, DockerJDBCIntegrationSuite}
+import org.apache.spark.sql.jdbc.DatabaseOnDocker
 import org.apache.spark.sql.types._
 import org.apache.spark.tags.DockerTest
 
@@ -39,7 +39,7 @@ import org.apache.spark.tags.DockerTest
  *
  */
 @DockerTest
-class MySQLIntegrationSuite extends DockerJDBCIntegrationSuite with V2JDBCTest {
+class MySQLIntegrationSuite extends DockerJDBCIntegrationV2Suite with V2JDBCTest {
   override val catalogName: String = "mysql"
   override val db = new DatabaseOnDocker {
     override val imageName = sys.env.getOrElse("MYSQL_DOCKER_IMAGE_NAME", "mysql:5.7.36")
@@ -57,13 +57,17 @@ class MySQLIntegrationSuite extends DockerJDBCIntegrationSuite with V2JDBCTest {
   override def sparkConf: SparkConf = super.sparkConf
     .set("spark.sql.catalog.mysql", classOf[JDBCTableCatalog].getName)
     .set("spark.sql.catalog.mysql.url", db.getJdbcUrl(dockerIp, externalPort))
+    .set("spark.sql.catalog.mysql.pushDownAggregate", "true")
 
   override val connectionTimeout = timeout(7.minutes)
 
   private var mySQLVersion = -1
 
-  override def dataPreparation(conn: Connection): Unit = {
-    mySQLVersion = conn.getMetaData.getDatabaseMajorVersion
+  override def tablePreparation(connection: Connection): Unit = {
+    mySQLVersion = connection.getMetaData.getDatabaseMajorVersion
+    connection.prepareStatement(
+      "CREATE TABLE employee (dept INT, name VARCHAR(32), salary DECIMAL(20, 2)," +
+        " bonus DOUBLE)").executeUpdate()
   }
 
   override def testUpdateColumnType(tbl: String): Unit = {
@@ -119,4 +123,9 @@ class MySQLIntegrationSuite extends DockerJDBCIntegrationSuite with V2JDBCTest {
   override def supportsIndex: Boolean = true
 
   override def indexOptions: String = "KEY_BLOCK_SIZE=10"
+
+  testVarPop()
+  testVarSamp()
+  testStddevPop()
+  testStddevSamp()
 }

external/docker-integration-tests/src/test/scala/org/apache/spark/sql/jdbc/v2/OracleIntegrationSuite.scala

@@ -18,13 +18,14 @@
 package org.apache.spark.sql.jdbc.v2
 
 import java.sql.Connection
+import java.util.Locale
 
 import org.scalatest.time.SpanSugar._
 
 import org.apache.spark.SparkConf
 import org.apache.spark.sql.AnalysisException
 import org.apache.spark.sql.execution.datasources.v2.jdbc.JDBCTableCatalog
-import org.apache.spark.sql.jdbc.{DatabaseOnDocker, DockerJDBCIntegrationSuite}
+import org.apache.spark.sql.jdbc.DatabaseOnDocker
 import org.apache.spark.sql.types._
 import org.apache.spark.tags.DockerTest
 
@@ -54,8 +55,9 @@ import org.apache.spark.tags.DockerTest
  * This procedure has been validated with Oracle 18.4.0 Express Edition.
  */
 @DockerTest
-class OracleIntegrationSuite extends DockerJDBCIntegrationSuite with V2JDBCTest {
+class OracleIntegrationSuite extends DockerJDBCIntegrationV2Suite with V2JDBCTest {
   override val catalogName: String = "oracle"
+  override val namespaceOpt: Option[String] = Some("SYSTEM")
   override val db = new DatabaseOnDocker {
     lazy override val imageName =
       sys.env.getOrElse("ORACLE_DOCKER_IMAGE_NAME", "gvenzl/oracle-xe:18.4.0")
@@ -73,9 +75,15 @@ class OracleIntegrationSuite extends DockerJDBCIntegrationSuite with V2JDBCTest
   override def sparkConf: SparkConf = super.sparkConf
     .set("spark.sql.catalog.oracle", classOf[JDBCTableCatalog].getName)
     .set("spark.sql.catalog.oracle.url", db.getJdbcUrl(dockerIp, externalPort))
+    .set("spark.sql.catalog.oracle.pushDownAggregate", "true")
 
   override val connectionTimeout = timeout(7.minutes)
-  override def dataPreparation(conn: Connection): Unit = {}
+
+  override def tablePreparation(connection: Connection): Unit = {
+    connection.prepareStatement(
+      "CREATE TABLE employee (dept NUMBER(32), name VARCHAR2(32), salary NUMBER(20, 2)," +
+        " bonus BINARY_DOUBLE)").executeUpdate()
+  }
 
   override def testUpdateColumnType(tbl: String): Unit = {
     sql(s"CREATE TABLE $tbl (ID INTEGER)")
@@ -93,4 +101,14 @@ class OracleIntegrationSuite extends DockerJDBCIntegrationSuite with V2JDBCTest
     assert(msg1.contains(
       s"Cannot update $catalogName.alt_table field ID: string cannot be cast to int"))
   }
+
+  override def caseConvert(tableName: String): String = tableName.toUpperCase(Locale.ROOT)
+
+  testVarPop()
+  testVarSamp()
+  testStddevPop()
+  testStddevSamp()
+  testCovarPop()
+  testCovarSamp()
+  testCorr()
 }

external/docker-integration-tests/src/test/scala/org/apache/spark/sql/jdbc/v2/PostgresIntegrationSuite.scala

@@ -22,7 +22,7 @@ import java.sql.Connection
 import org.apache.spark.SparkConf
 import org.apache.spark.sql.AnalysisException
 import org.apache.spark.sql.execution.datasources.v2.jdbc.JDBCTableCatalog
-import org.apache.spark.sql.jdbc.{DatabaseOnDocker, DockerJDBCIntegrationSuite}
+import org.apache.spark.sql.jdbc.DatabaseOnDocker
 import org.apache.spark.sql.types._
 import org.apache.spark.tags.DockerTest
 
@@ -34,7 +34,7 @@ import org.apache.spark.tags.DockerTest
  * }}}
  */
 @DockerTest
-class PostgresIntegrationSuite extends DockerJDBCIntegrationSuite with V2JDBCTest {
+class PostgresIntegrationSuite extends DockerJDBCIntegrationV2Suite with V2JDBCTest {
   override val catalogName: String = "postgresql"
   override val db = new DatabaseOnDocker {
     override val imageName = sys.env.getOrElse("POSTGRES_DOCKER_IMAGE_NAME", "postgres:14.0-alpine")
@@ -51,8 +51,13 @@ class PostgresIntegrationSuite extends DockerJDBCIntegrationSuite with V2JDBCTes
     .set("spark.sql.catalog.postgresql.url", db.getJdbcUrl(dockerIp, externalPort))
     .set("spark.sql.catalog.postgresql.pushDownTableSample", "true")
     .set("spark.sql.catalog.postgresql.pushDownLimit", "true")
+    .set("spark.sql.catalog.postgresql.pushDownAggregate", "true")
 
-  override def dataPreparation(conn: Connection): Unit = {}
+  override def tablePreparation(connection: Connection): Unit = {
+    connection.prepareStatement(
+      "CREATE TABLE employee (dept INTEGER, name VARCHAR(32), salary NUMERIC(20, 2)," +
+        " bonus double precision)").executeUpdate()
+  }
 
   override def testUpdateColumnType(tbl: String): Unit = {
     sql(s"CREATE TABLE $tbl (ID INTEGER)")
@@ -84,4 +89,12 @@ class PostgresIntegrationSuite extends DockerJDBCIntegrationSuite with V2JDBCTes
   override def supportsIndex: Boolean = true
 
   override def indexOptions: String = "FILLFACTOR=70"
+
+  testVarPop()
+  testVarSamp()
+  testStddevPop()
+  testStddevSamp()
+  testCovarPop()
+  testCovarSamp()
+  testCorr()
 }